Those wretches tainted with the error of Indifferentism and Modernism hold that dogmatic truth is not absolute, but relative: that is, that it must adapt itself to the varying necessities of the times and the varying dispositions of souls, since it is not contained in an unchangeable revelation, but is, by its very nature, meant to accommodate itself to the life of man.
Pope Pius XIMan cannot be exempted from his divinely-imposed obligations toward civil society, and the representatives of authority have the right to coerce him when he refuses without reason to do his duty. Society, on the other hand, cannot defraud man of his God-granted right... Nor can society systematically void these rights by making their use impossible.
Pope Pius XIThese principles with due regard to time and place, must, in accordance with Christian prudence, be applied to all schools, particularly in the most delicate and decisive period of formation, that, namely, of adolescence; and in gymnastic exercises and deportment special care must be had of Christian modesty in young women and girls which is so gravely impaired by any kind of exhibition in public.
Pope Pius XIEducation belongs pre-eminently to the church ... neutral or lay schools from which religion is excluded are contrary to the fundamental principles of education.
Pope Pius XICapitalism itself is not to be condemned. And surely it is not vicious of its very nature, but it has been vitiated.
Pope Pius XIThis power becomes particularly irresistible when exercised by those who, because they hold and control money, are able also to govern credit and determine its allotment, for that reason supplying, so to speak, the lifeblood to the entire economic body, and grasping, as it were, in their hands the very soul of production, so that no one dare breathe against their will.
Pope Pius XIQuite agreeable, of course, was this state of things to those who thought it in their abundant riches the result of inevitable economic laws and accordingly, as if it were for charity to veil the violation of justice which lawmakers not only tolerated but at times sanctioned, wanted the whole care of supporting the poor committed to charity alone.
Pope Pius XI